CO2 Heat Pump Intelligent Defrosting Design Based on PLC

Jun Hong Yang; Qiang Zhu; Shen Liu

doi:10.4028/www.scientific.net/AMR.1079-1080.476

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1079-1080CO2 Heat Pump Intelligent Defrosting Design Based...

CO2 Heat Pump Intelligent Defrosting Design Based on PLC

Abstract:

CO2 heat pump is a new type refrigeration equipment of energy saving, environmental protection and high efficiency, it is the basic direction of future sustainable development in HVAC. But it runs in winter, because of the influence of the external environment will be the formation of frost on the evaporator surface, thereby reducing the heat capacity of heat pump units, even in normal operation. Combined with the practical application of CO2 heat pump, the design of a PLC based intelligent defrosting system; this system is a good solution to the CO2 heat pump, low temperature and high humidity environment of the defrosting problem.

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Periodical:

Advanced Materials Research (Volumes 1079-1080)

Pages:

476-479

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1079-1080.476

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Online since:

December 2014

Authors:

Jun Hong Yang*, Qiang Zhu, Shen Liu

Keywords:

Defrost, Evaporator, Heat Pump, Hot Gas Bypass, Pressure Recovery

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* - Corresponding Author

References

[1] J. Bouma, International Heat Pump Status and Trends, 20th International Congress of Refrigeration, 1999, (3): 10.

Google Scholar

[2] T. Saito, T. Yshii, Regional report – Asia and Pacific, 7th International Energy Agency Conference on Heat Pump Technologies, 2002, (1): 38-46.

Google Scholar

[3] J. Allard, R. Heinzen, Adaptive Defrost, IEEE Transactions on Industry Application, 1988, 24(1): 39-42.

DOI: 10.1109/28.87247

Google Scholar

[4] T. Senshu, H. Yasuda, S. Kuroda, Heat Pump Performance Under Frosting Conditions: Part1-Heat and Mass Transfer on Cross-finned Tube Heat Exchangers Under Frosting Conditions, Ashrae Trans, 1990, Vol. 96, Part1: 324-329.

DOI: 10.1016/s0017-9310(02)00346-0

Google Scholar